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I have some fields which are configured as long text fields, which I need to display as <input type="text /> instead of <textarea></textarea>.

I'm trying to find the correct naming convention so that I can have some theme overrides in my templates folder.

Is that the correct approach? Is there documentation about overriding specific field outputs on edit screens?

  • 1
    You can't "theme" a Form API input field the same way as frontend output fields. You have to create your own module and implement a custom field widget. – Hudri Jul 15 at 20:27
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Drupal textfield widget can only be applied to string fields. https://git.drupalcode.org/project/drupal/blob/8.7.4/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextfieldWidget.php#L9

However it's not a big deal to alter its definition and make it support long strings.

/**
 * Implements hook_field_widget_info_alter().
 */
function HOOK_field_widget_info_alter(array &$info) {
  $info['string_textfield']['field_types'][] = 'string_long';
}

After having this done it should be possible to assign textfield widget to long text fields on "Manage form display" page.

  • Nice. That did it! Thank you. – jhchnc Jul 22 at 15:39

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